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Finding the Fourth Proportional to 156,990.93, 216,649.02 and 85,372.50

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Solution

The fourth proportional to 156,990.93, 216,649.02 and 85,372.50 is: 117,814.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,990.93 : 216,649.02 = 85,372.50 : x
  2. Step 2: Convert to fraction form
    156,990.93/216,649.02 = 85,372.50/x
  3. Step 3: Cross multiply
    156,990.93x = 216,649.02 × 85,372.50
  4. Step 4: Simplify right side
    156,990.93x = 18,495,868,459.95
  5. Step 5: Solve for x
    x = 18,495,868,459.95/156,990.93
  6. Step 6: Final answer
    x = 117,814.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.